My Scottish Grandma's Famous Shortbread Recipe + Why I Flew to Florida for it!

320g or 2 -2.5 CUPS AP FLOUR
110g or 1/2 CUP WHITE RICE FLOUR
110g or 1/2 CUP SUGAR
220g or 2 STICKS COLD BUTTER(16 TBSP) (cut into small cubes or grated on box grater)
3g SALT or 1/2 tsp

1. Combine flour, rice flour, butter, sugar, and salt in bowl of stand mixer or in medium mixing bowl
2. Mix on low speed for 3-4 minutes or until butter and flour are pebble like
3. Mix on medium speed for 10 more minutes or about 15 minutes in total or until dough is formed and is clearing the bowl as shown in video.
4. Once mixed, move dough over to half sheet pan lined with parchment paper
5. Press shortbread dough into a rough 9"x7" or 20x17cm rectangle (roughly)
6. If you'd like perfect rectangles, perforate as shown in video, then score with fork
7. Bake at 275F or 135C for 45 mins to 75 mins depending on how crunchy you'd like.